They cycle through the same names every 6 years. If a storm is particularly bad, the name is retired and replaced.
Hmmm....would they ever retire a name like Hurricane Delta?
Why did they skip over Q, U, X, Y, Z?
What’s wrong with Quentin, Ursula, Xiaoping, Yolanda, Zelda?
As far as why the last 5 letters of the alphabet are not used, I have no clue, unless it has something to do with the preponderance of available names to pick from in the first 21 letters of the alphabet, and that the list of names even grows faster there than they do in the last 5 letters.
But that is strictly a guess.
There have been:
As of 2024, 96 storm names have been retired. starting from from the 1950s
Pacific cyclone names, there have only 17 names retired.
So, if hurricanes are due to climate change, why are there so few storms happening in the Pacific Ocean